Add additional options for Drag Scroll config (#20523)

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Alex Miller 2023-04-30 01:28:00 -04:00 committed by GitHub
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@ -434,6 +434,75 @@ bool process_record_user(uint16_t keycode, keyrecord_t *record) {
This allows you to toggle between scrolling and cursor movement by pressing the DRAG_SCROLL key.
### Advanced Drag Scroll
Sometimes, like with the Cirque trackpad, you will run into issues where the scrolling may be too fast.
Here is a slightly more advanced example of drag scrolling. You will be able to change the scroll speed based on the values in set in `SCROLL_DIVISOR_H` and `SCROLL_DIVISOR_V`. This bit of code is also set up so that instead of toggling the scrolling state with set_scrolling = !set_scrolling, the set_scrolling variable is set directly to record->event.pressed. This way, the drag scrolling will only be active while the DRAG_SCROLL button is held down.
```c
enum custom_keycodes {
DRAG_SCROLL = SAFE_RANGE,
};
bool set_scrolling = false;
// Modify these values to adjust the scrolling speed
#define SCROLL_DIVISOR_H 8.0
#define SCROLL_DIVISOR_V 8.0
// Variables to store accumulated scroll values
float scroll_accumulated_h = 0;
float scroll_accumulated_v = 0;
// Function to handle mouse reports and perform drag scrolling
report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {
// Check if drag scrolling is active
if (set_scrolling) {
// Calculate and accumulate scroll values based on mouse movement and divisors
scroll_accumulated_h += (float)mouse_report.x / SCROLL_DIVISOR_H;
scroll_accumulated_v += (float)mouse_report.y / SCROLL_DIVISOR_V;
// Assign integer parts of accumulated scroll values to the mouse report
mouse_report.h = (int8_t)scroll_accumulated_h;
mouse_report.v = (int8_t)scroll_accumulated_v;
// Update accumulated scroll values by subtracting the integer parts
scroll_accumulated_h -= (int8_t)scroll_accumulated_h;
scroll_accumulated_v -= (int8_t)scroll_accumulated_v;
// Clear the X and Y values of the mouse report
mouse_report.x = 0;
mouse_report.y = 0;
}
return mouse_report;
}
// Function to handle key events and enable/disable drag scrolling
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
case DRAG_SCROLL:
// Toggle set_scrolling when DRAG_SCROLL key is pressed or released
set_scrolling = record->event.pressed;
break;
default:
break;
}
return true;
}
// Function to handle layer changes and disable drag scrolling when not in AUTO_MOUSE_DEFAULT_LAYER
layer_state_t layer_state_set_user(layer_state_t state) {
// Disable set_scrolling if the current layer is not the AUTO_MOUSE_DEFAULT_LAYER
if (get_highest_layer(state) != AUTO_MOUSE_DEFAULT_LAYER) {
set_scrolling = false;
}
return state;
}
```
## Split Examples
The following examples make use the `SPLIT_POINTING_ENABLE` functionality and show how to manipulate the mouse report for a scrolling mode.